5981121 has 20 divisors (see below), whose sum is σ = 9157764. Its totient is φ = 3888000.

The previous prime is 5981099. The next prime is 5981123. The reversal of 5981121 is 1211895.

It can be written as a sum of positive squares in 2 ways, for example, as 505521 + 5475600 = 711^2 + 2340^2 .

It is not a de Polignac number, because 5981121 - 2¹⁷ = 5850049 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5981123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2421 + ... + 4221.

Almost surely, 2^5981121 is an apocalyptic number.

It is an amenable number.

5981121 is a deficient number, since it is larger than the sum of its proper divisors (3176643).

5981121 is a wasteful number, since it uses less digits than its factorization.

5981121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854 (or 1845 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 5981121 is about 2445.6330468817. The cubic root of 5981121 is about 181.5212733756.

The spelling of 5981121 in words is "five million, nine hundred eighty-one thousand, one hundred twenty-one".